All Java related Questions

Explain Socket Programming in Java, how to do it ? where to start coding etc..

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how to use JDBC in Java ?

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What is Exceptions in java? How to use Exceptions in java?

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how to generate a Swiss QR Bill code with Android ?

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how to Convert String to Integer in Android ?

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I am new to java and android, want to initialize the new array and use it to store strings, so can someone help me to understand how to set Array in Android or java?

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What is reverse string ?

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what is Difference between Array vs ArrayList in Java ?

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i found following error with Full error [le] The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at com.mysql.jdbc.Util.handleNewInstance(Util.java:425) at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:989) at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:341) at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2251) at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2284) at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2083) at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:806) at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at com.mysql.jdbc.Util.handleNewInstance(Util.java:425) at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:410) at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:328) at java.sql.DriverManager.getConnection(DriverManager.java:664) at java.sql.DriverManager.getConnection(DriverManager.java:247) at swingtest.SwingTest.main(SwingTest.java:38) Caused by: java.net.ConnectException: Connection refused: connect at java.net.DualStackPlainSocketImpl.connect0(Native Method) at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79) at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) at java.net.Socket.connect(Socket.java:589) at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:211) at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:300) [/le]

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how to use GroupLayout in Java Swing ? what is meaning of above statement in Java Swing ? how one can adjust Layout In Java Swing ?

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how to use Youtube api in java

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how to convert html to PDF in Java

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i tried to add .jar file to Java Swing Application at Eclipse , but did not get success . so i turn to NetBeans but still not got sucess so can any show me how to add .jar file to Eclipse or NetBeans

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coding my first application for Swing (Java) trying to fetch the result from MySQL and loading it to JTable i have done Now how to apply resultSet in setModel(TableModel dataModel) need to convert resultSet To TableModel in Java Swing ? how to do it ?

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i have made some code to connect with SQLite in Java following is what i made but getting some error java.lang.ClassNotFoundException: org.sqlite.JDBC So whats wrong with it ?

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Is Java SplittableRandom.split() threadsafe?

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convert array ---> ArrayList suppose array is defined like this whether it auto type conversion array to ArrayList or any conversion method or what ?

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what is difference between keyword "Static" and "final" keyword in java , what are the use of it so we can justify and utilize object oriented concept , if good example will great help

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How can i measure distance of object from camera in android ? i am developing app for android people can measure distance from their mobile to particular object , and i found some app also working on same concept like some android app :: smart distance - etc. give me some hint so i can measure distance of object from camera in android .

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